/*
 * Copyright (c) 2018 Zilliqa
 * This source code is being disclosed to you solely for the purpose of your
 * participation in testing Zilliqa. You may view, compile and run the code for
 * that purpose and pursuant to the protocols and algorithms that are programmed
 * into, and intended by, the code. You may not do anything else with the code
 * without express permission from Zilliqa Research Pte. Ltd., including
 * modifying or publishing the code (or any part of it), and developing or
 * forming another public or private blockchain network. This source code is
 * provided 'as is' and no warranties are given as to title or non-infringement,
 * merchantability or fitness for purpose and, to the extent permitted by law,
 * all liability for your use of the code is disclaimed. Some programs in this
 * code are governed by the GNU General Public License v3.0 (available at
 * https://www.gnu.org/licenses/gpl-3.0.en.html) ('GPLv3'). The programs that
 * are governed by GPLv3.0 are those programs that are located in the folders
 * src/depends and tests/depends and which include a reference to GPLv3 in their
 * program files.
 */

#ifndef __SAFEMATH_H__
#define __SAFEMATH_H__

template <class T>
class SafeMath {
 public:
  static bool mul(const T& a, const T& b, T& result);
  static bool power(const T& base, const T& exponent, T& result);
  static T power(const T& base, const T& exponent, bool isCritical = false);
  static bool div(const T& a, const T& b, T& result);
  static bool sub(const T& a, const T& b, T& result);
  static bool add(const T& a, const T& b, T& result);

 private:
  static bool IsSignedInt(const T& a);
  static bool IsUnsignedInt(const T& a);
  static bool add_signint(const T& a, const T& b, T& result);
  static bool add_unsignint(const T& a, const T& b, T& result);
  static bool sub_signint(const T& a, const T& b, T& result);
  static bool sub_unsignint(const T& a, const T& b, T& result);
};

#include "SafeMath.tpp"

#endif  //__SAFEMATH_H__
